Benefits of CNG

Green fuel - Commonly referred to as the green fuel because of its lead and sulphur free character, CNG reduces harmful emissions thus reducing the effect of global warming. Being non-corrosive, it enhances the longevity of spark plugs. Due to the absence of any lead or benzene content in CNG, the lead fouling of spark plugs, and lead or benzene pollution are eliminated.

Safety:CNG is less likely to auto-ignite on hot surfaces, since it has a high auto-ignition temperature (540 degrees centigrade) and a narrow range (5%-15%) of inflammability. It means that if CNG concentration in the air is below 5% or above 15%, it will not burn. This high ignition temperature and limited flammability range makes accidental ignition or combustion very unlikely.

Properties

Unit

Petrol

Diesel

LPG

CNG

Relative density

Water = 1

0.74

0.84

0.55

-

Relative density

Air =1

-

-

1.285

0.64

Auto-ignition

Temperature

Degree C

360

280

374

540

Flammability Range

% in Air

1-8

0.6-5.5

2.2-9.0

5-15

Flame Temperature

Degree C

2,030

1,780

1,983

1,900

Octane Number

-

87

-

93

127

Low operational cost The operational cost of vehicles running on CNG, as compared to those running on other fuels, is significantly low. At the prevailing price of fuel in Delhi, Operational cost of CNG vehicles is 66% lower than petrol and 28% lower than diesel.

Increased life of oils Another practical advantage observed is the increased life of lubricating oils, as CNG does not contaminate and dilute the crankcase oil.

Mixes evenly in air Being a gaseous fuel CNG mixes in the air easily and evenly.

Easily Availability:

IGL has around 418 CNG filling stations in Delhi and NCR

Other than Delhi CNG is also available in 41 cities and would be available in more than 300 cities in near future. Car / Taxi, dual fuel option is available that helps in switching between CNG and petrol as and when required